Possible Clues:

• Trite
• Run-of-the-mill organisation is stirred to action
• Showing no imagination
• Eliciting a yawn perhaps as beginning to nod, rip undies off
• *See 61-Across
• Dull, as writing
• Unimaginative, dull
• Boring loveless marriage coming pointedly to an end
• Loveless marriages — good, dangerous, or boring?